If adenylate cyclase is inhibited, what would be the effect on cyclic AMP production and subsequent cellular responses?

• A. Cyclic AMP production would decrease, leading to reduced activation of protein kinase A and cellular responses.
• B. Cyclic AMP would directly activate the GPCR.
• C. Cyclic AMP would be converted to ATP.
• D. Cyclic AMP production would increase, enhancing cellular responses.

Answer: (A)